Improved tool-post



. ,tool-post.

stent otitis.

FAYETTE HARDENBERGH, 0F PROVIDENCE, RHODE ISLAND.

Letters Patent N 96,426, dated November 2, 1869.

The Schedule referred to in these Letters Patent and making part cf thesame.

`To all' whom it may concern:

Be it. known that I, FAYn'rTE HARDEXBERGH, of the city and count-y ofProvidence, in the VState of' Rhode Island, have invented a new anduseful Improvement in Tool-Posts; and I do hereby declare that thefollowing specitication, taken in connection with the di'awil'igs,making a part of the same, is a full, clear, and exact descriptionthereof.

Figures 1 and 2 are, respectively, front'and side views-of the improvedtool-post.

Figures 3, 4, and 5, exhibit different forms of a holding-block usedwith the post.

Figures 6, 7, and 8,1eprcsent dierent forms of tools that maybe used.

My invention seeks to secure all the advantages which result from theuse of a tool, which does notl require to be refbrged, but which, whenonce properly shaped, can be usedl until worn out from repeatedgrindings; Heretofore it has, been customary to adapt this class of'tools to a holder, which latter is made of the size required to titthe. ordinary lnortise in the Although such tools and holders serve inmany cases a useful purpose, they have not come into general use,notwithstanding their many advantages, by reason ofthe fact that theymust be, with the ordimuy form and construction of the tool-post, toosmall for any but the lighter classes ot' work.

My ilnpriwemcnt consists in the construction of a tool-post ofparticular form, and the colnbinatimi therewith ot' interchangeabletoolholders adapted to t-wo or more tools ot' different forms anddimensions, and which present the tools to the work at the same ordifferent angles.

Referring to tgs. l and 2 A is the substitute for the post heretoforecommonly used. It is secured to the frame of the lathe by a clamp-boltpassing through the slot a in the bedpiece;

The portion of the post designated as B is at nearly a right angle withthe portion A, its angle of inclination being such as is deemed mostadvisable, so as to enable the cutting-tool tobe held in a positionumostfavorable to make its cut, having reference to the direction of thelibre of the metal of the tool.A

'lhe face ofthe upright portion B is recessed to the depth of aboutseveneighths of au inch, and for thel width of about one and one-fourthinch, more or less.

The purpose of this recess is -to receive a metal block, G, which is thetool-holder proper.

This block is one of many which may bc fitted to such recess, and theyare channelled, as at b, in a way best suited to accommodate tools ofdiiferentcforms and sizes, figs. 3, 4, and -5.

The block, with its tool, is held in the post'by clamp, D, as shown, orby other convenient means From the foregoing, it will be readilyunderstood that the same post, by merely changing the holdingblock, canbe used with a single tool ot' the largest size that for ordinary work`is employed, or with a gang of two or more tools; and this lattercapacity is of great economy where both a right and a left-handed toolis required upon the same piece of work, or where, as in finishingoi't-op rollers for spinning-machinery, perfect identity in the lengthof the several barrels of the rollers is desired. f

I do not' claim as newthe employment of'a tool-v holder for a separatecutting-tool, whose cross-section` is the same throughout its length, asmany varieties of such are'lmown; but

What I claim as my invention, and desire to secure by Letters Patent,is-

A tool-post, A B, constructed substantially as described, and combinedwith interchangeable tool-l1old ingblocks C, as specified.

' Witnesses:

EDWARD C. AMES, ORVILLE PECKHAM. y

FAYETTE HARDENBERGH.'

